[ Toán 10] Hệ Phương Trình

R

ronalduc95

nagakagoa

giai phuong trinh [1] va [3] bang cach chia ca hai ve voi [x-y]ta se co x^2=5z^2 <=> x=sqrt[5]z hoac x=-sqrt[5]z
thay x theo z vao phong trinh [2] kethop voi phong trinh [1] =>gai hpt rut z theo y the vao pt con lai => yim duoc z => x; y
xin loi la minh viet chu ko trinh bay vi qua dai
 
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